if x =√7+4√3 then x+1/x=
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x=7+4√3
1/x=1/7+4√3
x+1/x=(7+4√3)+1/(7+4√3)
=(7+4√3)^2+1/(7+4√3)
=49+48+56√3+1/7+4√3
=98+56√3/7+4√3
1/x=1/7+4√3
x+1/x=(7+4√3)+1/(7+4√3)
=(7+4√3)^2+1/(7+4√3)
=49+48+56√3+1/7+4√3
=98+56√3/7+4√3
thoran13:
That is not 7 it is √7
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